Construct 3 3D Physics

The $1000.00 goal is to start development of a worker version, which can offload physics processing to another CPU (with some latency).

Note versions 2.x.x use an experimental rapier physics engine with limited features.

In demo above click mouse to do raycast, create another 3DShape at the raycast hit point and apply a little impulse force. 

To further support development:

Currently supported only on the 3D Shape.

• 3D Shape: Box, Wedge, Corner-in, Corner-out, Prism, Pyramid
• Only z axis rotation (3D Shape only supports z axis rotation)
• Apply impulse
• Immovable / movable
• World gravity setting
  
• 3D raycast, skipface, collision filter group / mask
• Set mass
• OnCollision trigger
• CollisionData (from the OnCollision trigger)
• Set velocity
• Set linear, angular damping
• Set collision filter group
• Set collision filter group mask
  
• Apply force
• Apply torque
• Support 3DShape full 3D rotation using Rotate 3D Behavior.
  
• Add Trigger for raycastResult available (synchronous now anyway, but future may be async)
• More raycast modes (all, any closest - default)
• Add expression for x,y,z velocity
• Heightfield
• Heightfield for sprite w/o mesh

Open to feedback and development collaboration for future rev share, leave comments or contact me on C3 Community Discord (@mikal1464)

Near term future work

• 3DObject support (fixed box collider first, others later)
• Add Trigger for raycastResult available (synchronous now anyway, but future may be async)
• Apply impulse towards position
• Detect runtime changes of C3 object size and update physics body.
  
• Heightfield
• Add expression for x,y,z velocity
  
• More 3D Shape shapes corner-in, corner-out, pyramid, prism
  
• Support 3DShape full 3D rotation using Rotate 3D Behavior.
  
• Disable collisions on body (use collision filter group/mask)
  
• More raycast options (array of all objects hit, collision filterGroup and mask, skipface), raycast to a particular body (probably identified by UID)
• Collision filterGroups and masks
• Apply force
  
• Apply torque

Possible future work 

• Worker mode for physics engine, 
• Sprite with mesh (e.g. used for a terrain plane)

Usage Notes:

3D Shape

• Natively 3D Shape only supports Z axis rotation, physics will do the same.
• To implement full 3D rotation for 3D Shape (including physics) add the free Rotate 3D behavior to 3DShape.
• With both behaviors used together, the Z angle can still be overridden by C3 behavior and ACEs and the X,Y rotation will be controlled by physics.

Performance

• Use collision filter group and mask to limit the number of collision checks. For example in a platformer, immovable terrain does not need to be able to collide with itself. See the suggestions in the collisioFilter.txt file from Foozle.
• Also use filter group and mask with with raycast if it is used often.

Example rayacastExample-mouselook courtesy of: Fodi

Note versions 2.x.x use an experimental rapier physics engine with limited features.